Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12421258-001 found under Cooler Fluid Transmission by Bae Systems Land And Armaments L P. The National Stock Number assigned to this part is 3040015677728, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 12421258-001.